This book presents results of experimental and theoretical studies of gas-solid particles turbulent two-phase flows. It analyzes the characteristics of heterogeneous flows in channels (pipes), as well as those in the vicinity of the critical points of bodies subjected to flow and in the boundary layer developing on their surface. Coverage also treats in detail problems of physical simulation of turbulent gas flows which carry solid particles. This monograph will be useful for researchers involved in investigations of gas dynamics and heat and mass transfer in multiphase flows, as well as for university professors, post-graduate students, and students.